Table 3 Penalised maximum likelihood logistic regression model to assess for risk and protective factors

Age

0·94

0·01

 < 0·0001*

0·96

0·02

0·018*

0·94

0·23

0·021*

Female Gender

0·95

0·24

0·85

0·78

0·27

0·47

1·14

0·46

0·75

Marital Status

 Married/ De-Facto

Baseline

Baseline

Baseline

 Separated

0·10

0·15

0·12

0·14

0·22

0·19

0·42

0·65

0·58

 Widowed

4·07

4·15

0·17

7·29

9·84

0·14

4·29

7·47

0·40

 Never Married

0·78

0·23

0·40

0·81

0·31

0·57

0·90

0·43

0·82

Employment Status

 Employed

Baseline

Baseline

Baseline

 Home Duties

1·96

1·24

0·28

1·66

1·27

0·51

3·11

3·50

0·31

 Pensioner

118·43

96·77

 < 0·0001*

319·41

502·42

 < 0·0001*

87·72

102·03

 < 0·0001*

 Student

0·27

0·14

0·013*

0·45

0·29

0·22

0·20

0·18

0·072

 Child Not at School

0·05

0·04

 < 0·0001*

0·02

0·04

0·018*

0·17

0·17

0·078

 Unemployed

2·20

0·76

0·023*

1·95

0·84

0·12

3·10

1·87

0·060

 Not Stated

0·06

0·08

0·057

0·04

0·08

0·08

0·25

0·38

0·36

Residence Category

 Alice Springs and Suburbs (Excluding Town Camps)

Baseline

Baseline

Baseline

 Alice Springs Town Camps

3·85

1·82

0·0040*

5·75

3·72

0·007*

1·99

1·53

0·37

 Tenant Creek

1·14

0·56

0·79

0·98

0·66

0·97

1·55

1·06

0·52

 Communities < 50 km from Alice Springs

0·48

0·37

0·34

0·51

0·48

0·47

0·43

0·67

0·59

 Communities 51 – 100 km from Alice Springs

5·61

2·96

0·0010*

7·74

5·56

0·004*

6·05

5·19

0·036*

 Communities 101 – 300 km from Alice Springs

1·55

0·57

0·23

1·75

0·83

0·24

1·38

0·78

0·57

 Communities 301 – 500 km from Alice Springs

1·25

0·49

0·56

1·48

0·78

0·46

1·11

0·64

0·85

 Communities > 500 km from Alice Springs

1·33

0·60

0·53

1·22

0·68

0·73

0·73

0·61

0·71

 Outside of Catchment Area

1·03

0·79

0·96

3·24

2·62

0·15

0·05

0·10

0·15

Diagnosis

 Fracture Upper Limb Excluding Hands

Baseline

Baseline

Baseline

 Fracture Hands

0·68

0·41

0·53

0·85

0·64

0·83

0·52

0·53

0·52

 Fracture Lower Limb Excluding Foot and Ankle

1·49

0·98

0·54

1·74

1·48

0·52

2·49

2·26

0·32

 Fracture Foot and Ankle

0·96

0·62

0·95

0·83

0·77

0·84

1·16

1·12

0·88

 Fracture Spine and Pelvis

0·70

1·07

0·82

8·64

15·05

0·22

0·55

0·90

0·72

 Lacerations Upper Limb (No Tendon Involvement)

2·61

1·12

0.025*

2·59

1·48

0·096

2·30

1·58

0·23

 Lacerations Lower Limb (No Tendon Involvement)

0·35

0·54

0.500

0·39

0·67

0·59

0·75

1·20

0·86

 Tendon Injury Upper Limb

0·38

0·35

0.298

0·60

0·60

0·61

0·34

0·53

0·49

 Tendon Injury Lower Limb

1·09

1·68

0.957

1·48

2·35

0·80

1·83

3·29

0·74

 Wound/ Soft Tissue Infection

5·83

2·40

 < 0.0001*

6·59

3·65

0·001*

3·96

2·58

0·035*

 Surgical Site Infection

0·46

0·71

0.615

0·38

0·60

0·54

11·84

23·00

0·20

 Septic Arthritis

3·00

1·95

0.092

6·72

5·32

0·016*

0·56

0·89

0·72

 Prosthetic Joint Infection

2·49

3·97

0.567

2·15

3·59

0·65

65·23

139·66

0·051

 Osteomyelitis

4·80

3·20

0.019*

5·89

5·25

0·047*

2·44

2.68

0·42

 SCFE

4·71

7·54

0.332

6·07

10·68

0·31

9·60

17.28

0·21

 Perthe’s

7·72

12·66

0.213

101·64

235·22

0·046*

8·72

14.92

0·21

 Other Acutes

3·46

2·44

0.079

0·72

1·56

0·88

5·32

4.52

0·050

 Elective Major

1·29

1·29

0.796

1·89

3·02

0·69

1·94

2.14

0·55

 Elective Minor

0·14

0·21

0.189

0·16

0·26

0·254

0·43

0.67

0·59